A Nederland woman was arrested on suspicion of attempted murder and first-degree assault Saturday after police say she repeatedly hit her boyfriend in the head with a flashlight because he threatened to leave her, according to an arrest affidavit.

According to the affidavit, Nederland police responded at 4:50 a.m. Saturday to a house at 170 E. Second St. after dispatchers said a woman -- later identified as Joy Carol Sorenson, 57, -- told them she hit a man in the head several times with a Maglite flashlight.

When an officer arrived on scene, he found the victim -- identified as Tyrone Lee, 53, -- lying in a large pool of blood coming from the back of his head. Lee was conscious but unable to move due to the pain in his neck and head, according to the report.

Sorenson was sitting in an armchair about 5 feet from Lee and had what appeared to be blood spatter on her legs and clothes, according to the report. She told the officer that she hit Lee with the flashlight five or six times.

Lee was taken to the Boulder Community Hospital by ambulance. At the hospital, Lee told an officer that Sorenson -- whom he was in a relationship with -- had called him over earlier in the day, but that he had told her he was breaking up with her because of the "crazy way she acts sometimes."

He said he planned on leaving but Sorenson told him to stay the night and said that he could sleep in her bedroom while she slept on the couch. But as he was getting ready for bed, Lee told police Sorenson told him "I want you out here with me." When he walked out into the living room, he told police, Sorenson ambushed him from behind and started beating him on the back of the head with the flashlight.

Lee told police s Sorenson stood over him shouting, "You should be dead now," and, "All men should be dead, (expletive)."

When asked why he thought she attacked him, Lee said, "Because I was going to leave and she did not like that."

Sorenson told police that she and Lee were sleeping together on the couch when Lee tried to put his hands down her pants. But later, according to police, Sorenson changed her story and said they were walking to the kitchen when he tried to put his hands down her pants and she reached for the nearest object and started to hit him.

The officer reported that Sorenson was, "well-known to Nederland police," and that she became agitated when she was questioned. She also appeared to be intoxicated, according to the affidavit.

Lee said Sorenson was very jealous of Lee's 27-year-old female roommate, "Marchella." Police noted that when Sorenson was questioned, she said, "Why don't you ask him about Marchella," and "it's her and her (expletive) dog's fault," according to the affidavit. She also mentioned a Trish, though Lee did not mention her to police.

According to the affidavit, Lee's sister had contacted police saying she thought Lee was not in a safe relationship. No action was taken as a result of the call. Sorenson has no prior criminal history in the state, according to Colorado court records.

Sorenson remains in custody at the Boulder County Jail on $250,000 bond. She is scheduled for a filing of charges on Thursday.

Lee was released from Boulder Community Hospital, according to officials. He suffered nine deep lacerations to his skull and two fractures to his vertebrae.

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